Creep strength variations related to grain boundaries in the equiatomic CoCrFeMnNi high-entropy alloy
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F24%3A00603669" target="_blank" >RIV/68081723:_____/24:00603669 - isvavai.cz</a>
Result on the web
<a href="https://www.webofscience.com/wos/woscc/full-record/WOS:001241231400001" target="_blank" >https://www.webofscience.com/wos/woscc/full-record/WOS:001241231400001</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.scriptamat.2024.116165" target="_blank" >10.1016/j.scriptamat.2024.116165</a>
Alternative languages
Result language
angličtina
Original language name
Creep strength variations related to grain boundaries in the equiatomic CoCrFeMnNi high-entropy alloy
Original language description
Compression and tensile creep of the equiatomic CoCrFeMnNi highentropy alloy was investigated at 1073 K and 1253 K. The highentropy alloy was either in the polycrystalline or monocrystalline solid solution state. We find that the polycrystalline variant creeps significantly faster than the monocrystalline variant at low applied stresses. Additionally, the stress exponent is lower for the polycrystalline samples (n 3) than the monocrystalline samples (n 5), which, according to a standard interpretation of creep data, implies a curious transition from viscous glide to climbcontrolled creep. Such a transition is difficult to rationalize given that our alloy composition and crystal structure remain the same and only the microstructure changes from polycrystalline to monocrystalline. We offer an alternative to the standard view where grain boundaries, which are only present in the polycrystalline material, serve as efficient sinks for dislocations and thus contribute to faster creep.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/GA14-22834S" target="_blank" >GA14-22834S: Phase Stability and Plasticity in Medium-to-High-Entropy Alloys</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Scripta Materialia
ISSN
1359-6462
e-ISSN
1872-8456
Volume of the periodical
249
Issue of the periodical within the volume
AUG
Country of publishing house
GB - UNITED KINGDOM
Number of pages
6
Pages from-to
116165
UT code for WoS article
001241231400001
EID of the result in the Scopus database
2-s2.0-85192467075